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Mark says : "Regarding the cleaning of the h/e i removed it from the boiler and cleaned with Fernox DS-3, then then ran clean water through and refitted back in boiler."

I'll ask him

Chemical flush did the trick, Mark came and did it yesterday and it's all back to normal now. :D

Hey Scatman ...hows tricks. I fixed it (the ignition failure) was a crack in the HT lead .... shorting onto the body. Now I'm back to the kettling scenario. The pump is deffo working in both CH and DHW must be bunged up somewhere ?

OK ... now it's just taking the ****..... The ignition is kaput... not even got CH now. On power up , the burner light comes on three times , but no spark, then gives a flashing safety lockout light ???

bugger this....it's twisting my melon man Going to put some coving up....can't go wrong with that.

OK ... heres another fact I 've just discovered .... when the CH has been on for a while, it does the same thing.... i.e...even though the switch is in the 1 position, the burner isn't running....but it doesn't just cut out for 5-6 seconds ..... it's been out for a few minutes now, with no sign...

AHA ! I'm having another moment (oo-err) If the DHW HE was bunged up, the flow rate through the main HE in DHW mode would be slow... and would kettle, flip it into CH mode , it aint going through the bunged up DHW HE any more, so we get a high flow rate through the main HE .....no kettling...

Thanks Rob.... Mark did check the burner pressures and reset the to the halstead specs. If you back off enough on the burner pressure, the problem goes away, but then the DHW is only luke warm. :cry: If there was kettling in the main HE wouldn't that affect the main CH operation as well ...

I'm guessing by the nice shiny-ness of the HE :wink: that it aint cheap ??

Hi Rob. .....excuse my ignorance....what is HE? edit...(DOH .... I'm guessing heat exchanger)

Yeah... I was trying to help olski with his home network, and it sort of ended up taking over the whole thread..... so I started this new one.

Mark is a plumber from just up the road a bit, he read the original thread and came down to fit me a new diaphragm... which did the trick and got the DHW microswitch operating again. Now I'm back to square one.... the original problem when you open the tap 1:burner ignites 2:10 seconds...

Well... more like 5 or 6 seconds

H E L P OK, I've just got off the phone with Mark, he has been down and replaced my DHW diaphragm (which had a hole in it) and the microswitch is now activating when the tap opens as expected, BUT , the DHW now overheats as it was doing before. It comes on when tap opens, runs for 10...

OK ... Time to try removing the router from the equation....try unplugging the LAN cable from your router and plugging it straight into the laptops lan connector. Set the desktops IP manually to 192.168.1.1 Set the laptop to obtain automatically ( on Local Area Conn) Can you ping each...

H E L P OK, I've just got off the phone with Mark, he has been down and replaced my DHW diaphragm (which had a hole in it) and the microswitch is now activating when the tap opens as expected, BUT , the DHW now overheats as it was doing before. It comes on when tap opens, runs for 10...

There's something screwy going on then .... when you do ipconfig /all it should show you the subnet mask Have you got zonealarm or any other 3rd party firewalls ?

OK...so the wireless can ping through the router to your desktop, but your desktop can't ping back, but can ping the router. What are the 2 IP addresses..... do they have the same subnet mask ? (the 255.255.255.0 bit ?)

:lol: It's up high on the side of a house in the windy pennines. The sensor pipe inside the flu measures the pressure difference in the Air above and below it. If the wind's blowing in the right direction, moisture can get into the flu...when this reacts with the sensor pipe it oxidies and...